Lens eccentric measuring method and its system

Abstract

A system for detecting core shift of lens comprises erection base with a notch, lens set on said notch, piezoelectric actuator with striking head, control unit, electronic shooting unit, central processing unit, angle sensing unit, display unit and microscope unit with the first mark and the second mark. Its detecting method is also disclosed.

Description

technical field [0001] The invention relates to a measurement method and a measurement system, in particular to a high-precision lens eccentricity measurement method and a system thereof. Background technique [0002] In order to detect the optical axis eccentricity error of the optical lens after manufacture, the industry currently uses the method of manually rotating the lens to cooperate with an optical eccentricity detection system to detect. As shown in FIGS. 1 and 2 , the optical off-center detection system includes a transmission microscope 1 and a display 2 electrically connected to the microscope 1 . The microscope 1 has a projection lens 101 marked with a projecting reticle 102, and a correction lens 103 marked with a correction reticle 104 (other optical lenses that cooperate with imaging are similar to general microscopes, so they will not be described in detail here), After the operator places a lens 3 to be inspected between the projection lens 101 and the cor...

AI Technical Summary

Problems solved by technology

[0004] 1. As shown in FIG. 2, the display 2 cannot record the starting angle of the lens 3, nor can it record the rotation angle of the lens 3, but can only show that when the lens 3 rotates, the projection reticle 102 is relative to the The instantaneous dynamic locus of the correction reticle 104, therefore, the operator can only roughly judge the rotation angle of the lens 3 and the optical axis eccentricity error between the projection reticle 102 and the correction reticle 104 based on experience. It is not only inaccurate to determine the angle of rotation of the lens 3 to have a smaller optical axis eccentricity error, but also because the eyesight of different operators is not the same, so as long as it is operated by a different operator, it is often the same. The problem of determining different rotation angles will arise. In addition, when each lens 3 is placed in a slightly different initial position, it will often lead to the problem of determining different rotation angles. Therefore, lenses 3 produced in the same batch are often Will produce different judgment results without repeatability

[0005] 2. The operator pushes the outer peripheral surface of the lens 3 by hand. Therefore, the operator cannot accurately control the angle change of each rotation of the lens 3, and the angle change of different operators will not be the same. In this way, it is not only impossible to accurately find out at what rotation angle the lens 3 has the smallest optical axis eccentricity error, but also different operators will produce different judgment results

[0006] 3. When the size of the lens 3 is too small, the lens 3 needs to be installed and positioned on a jig (not shown), and then the operator drives the lens 3 to rotate by pushing the jig. In order to detect, however, because the jig may produce gap errors and geometric shape errors during manufacture, and at the same time, the jig may also produce matching errors when it is assembled with the lens 3. In this way, it may cause the Before the lens 3 is rotated and detected, its optical axis has been deflected, which will affect the subsequent determination of the rotation angle

[0007] In addition, there are also companies that use reflective or folding microscopes for detection, but they also use manual rotation of the lens for detection, so the above-mentioned defects will also occur.

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